Trolley.



. R. W. WALKER.

TROLLEY;

APPLICATION FILEDOUT. 15,1906.

warm? PATENTED APR. 9, 1907.

UNITED STATES,

PATENT OFFICE.

Specification of Letters Patent.

Patented April 1907.

Application fiIed October 15,1906. Serial No. 3 ,944.

1'0 11,64 w/wm itmay concern: I

Be it known that I, RICHARD W. WALKER, a citizen of the United States ofAmerica, residing at Topeka, in the county of Shawnee and State ofKansas, have invented certain new and useful Improvements in Trolleys,of

which the following is such a full, clear, and

exact description as will enable others skilled in the art to which itappertains-to make and use the same. v

This invention relates to improvements in trolleys, and has for itsobject the provision of means whereby an obstruction on the wire may bereadily passed, the trolley-wheel will beheld to the wire durin'g thetravel of the car, and will be guided to the wire when be ing shifted atthe end of the line or other places. These objects are attained by theuse of the mechanism shown in the accompanying drawings; and theinvention consists in certain novel features of the same, as will behereinafter first fully described and then particularly pointed out inthe claims.

In the drawings, Figure 1 is a side elevation of the upper portion of atrolley-pole with its trolley-wheel and having my im provements appliedthereto. Fig. 2 is a plan view of the same, andFig. 3 is a rearelevation thereof.

Referring to the drawings, 1 designates the trolley-wire, 2 thetrolley-pole, and 3 the trolley-wheel mounted in the upper end of thepole and in contact with the wire.

In carrying out my invention a yoke 4 is pivotally mounted on the endsof the trolleywheel spindle and depends below the trolleywheel, asclearly shown. Arms 5 are hinged to the upper ends of the sides of the,said yoke, so as to swing outward therefrom, and the upper extremitiesof these arms are bifurcated, as shown at 6. furcation's 6 are dogs orkeepers 7, the upper or outer edges of which present straight obliquefaces, as shown at 8, and the inner or under edges of-whichprovide thecurved edges 9, adapted to meet over the trolley-wire, and the notches10 at the lower ends of said. curved portions, while below said notchesthe dogs are shaped to provide recesses 11, adapted to engage the arms 5in the normal position of the parts, and thereby prevent the lower endsof the,dogs dropping so liar as to throw the upper ends of the do soutward from their position. over the trolley-wire. The ,lower'ends ofthe dogs are widened. latorally, as shown at 12, to provide greater arep the ends of t diametrically across said ends.

Pivoted in the biweight and cause them to normally assume the positionshown in full lines in Fig. 3. Attached to then per inner ends of thedogs he trolley-cable 13, which pass downward through openings in thearms '5 and then through keepers on the yoke, being united below thesaid yoke and then passed downward to the car in the usual manner. Acasing 151i is secured on the trolley-pole near the upper end of thesame,

and the said'casing is provided with open ends and with pins or rollers.15, extending Extending through the casing are bars 16, which arepivoted together at an intermediate point of their length within thecasing and have their upper ortions bent laterally, so as to-clear thetro ley-wheel, the extremities of the bars being secured to the arms 5by universaljoints 1?. Both ends of both bars project beyond the ends ofthe casing and pass on opposite sides of the pins or rollers 15.

Within the casing are coiled springs 18,

which are secured to the pivot at the point of intersection of the barsand have their free ends bearing against the ends of the casing, asclearly shown in Fig. 1.

The operation of the device will be readily understood. The normalposition of the parts is shown in Fi s. .1 and 2 and infull lines inFig. 3. Shou d a cross-wire or' other obstruction be met by the trolleyin its travel along the line-wire the front or back of the dogs or thearms v5 will impinge against the obstruction, and the yoke 4 will bethereby swung around the spindle of the trolley-wheel, the direction .ofthe swingbeing dependent on whether the car ismoving forward or.backward. As the yoke .swings the arms-5, moving therewith, .will

pull or push on the bars 16, movin .them against the tension of thespring-18 through the casing. As the bars are thus moved through and outof. the casmg'theywill slide against the pins 15 and be thereby spread,

so as to move' the arms 5. outward and carrythe dogs 7 outward from overthe trolleywire. The trolley will consequently be permitted to rideunder .the obstruction and:

as soon as-the obstruction has been passed the spring 18will expand, soas to'dra'w the bars 16 again within the casing and return the Lpartsto. their initial positions. The

spring at the base of the trolley-pole will force the same u ward assoon as the ,ob.

.struction'is passe so that the trolley-wheel When the end ofthe linehas been reached and it is desired to reverse the trolley, the cable isdrawn downward in the usual manner of releasing the trolley. This actionwill cause the dogs to swing into the position shown in the upper dottedlines in Fig. 3, when their straight edges will form a large. finder toguide the wheel to the wire. When the contact of the wheel and the wireis made, the cable is released and the weighted ends of the dogs will atonce fall, so as to bring the dogs into the osition shown in full linesin Fig. 3, in whic position it is clear they will act as a keeper toprevent the trol- Iey-wheel jumping the wire.

The apparatus is obviously sim 1e and efficient, The spring 18 is suciently strong to hold the bars 16 normally within the casing, andconsequently maintain the dogs over the wire to prevent the'wheelslipping from the wire, while at the same time obstructions may bereadily passed. When the car is traveling forward, the meeting of .30 anobstruction will compress the upper spring 18, while if the car istraveling backward the lower spring 18 will be compressedv whenanobstruction is met. The 0 eration of the device as a keeper is entireyauto-' 'matic, and its use as a finder is'certain.

Having thus described my invention, what I claim, and desire to secureby Letters Patcut, is- I 1: In a trolley, the combination withthe' 2trolley-spindle, of a' yoke pivotally hung thereon, laterally-swingingarms carried by ,the said yoke, dogs mounted-on said arms and adaptedtomeet .over the trolley-wire,

and automatic means 'forswinging said arms as the yoke isvibrated.

2. Ina trolley,

trolley-spindle, of

as combination with the;

a yoke pivotally hungthereon, laterally-movable arms carried by theyoke, dogs mounted on the arms, and automatic means for holding saidarms normally over theyoke and causing them to move laterally when theyoke is vibrated.

3. In a trolley, the combination with the trolley-spindle, of a yokepivotally hung thereon, outwardly-swinging arms hinged to the upper endsof the yoke, dogs ivoted in the upper ends of said arms an adapted tomeet over the trolley-wire, and automatic means for moving the armslaterally when the yoke is vibrated.

4. The combination with the trolley-spindle, of a yoke pivotally hungthereon, laterally-swin ing arms on the yoke, dogs pivoted on sai armsand adapted to meet over the-trolley-wire and having their lower endsweighted and provided with shoulders to bear against the outer sides ofsaid arms, and

means for moving the arms laterally as the yoke is vibrated.

5, In a trolley, the combination with the trolley-spindle of a yokepivotally hung thereon, arms hinged to the upper ends of the yoke, dogsmounted in the upper ends of said arms, intersecting bars connected tosaid arms, and means for holding said bars normally together.

6. In a trolley, the combination with the trolleypindle of a yokepivotally hung thereon, arms hinged to the upper such of the yoke, dogscarried by said arms, intersecting bars pivoted together and carriedbythe trolley-pole and having their-u per ends connected to the' saidarms, a-fixe partbetween the intersecting bars, said bars between'saidfixed part and their pivot.

In testimony whereof I have signed this specification in the presence oftwo subscribf ing witnesses.

RICHARD W. WALKER.

. Witne'ssesz- JOHN V.' ABRAHAMS, "LILLIAN R. NATTsEN.

and a spring around

